2.47+7.1=9.57
7.1+2.47=9.57
9.57-2.47=7.1
9.57-7.1=2.47
The mass of an object will never change no matter what, however, the weight relies on gravity. So therefore, the answer would be D.
Assuming the +'s are actually x's 1/2 of 3 is 1.5 and 1.5 divided by 7 is 1.5/7.(answer is 1.5/7) hopefully I'm right.
Answer: a
Step-by-step explanation: look at the chart